| 摘要 |
1. A method for sintering ferroalloy materials in a continuously operated band sintering process, in which method the pellets to be sintered are arranged on the sintering underlay as an essentially even pellet bed, which pellet bed is conveyed on the sintering underlay through the various steps of the sintering process, and in connection with the sintering process, gas is conducted through the pellet bed, characterised in that at least the major part of the carbonbearing material needed for heating the pellet bed up to the sintering temperature is fed onto the surface of ready-made pellets prior to bringing the pellets to the sintering step. 2. A method according to claim 1, characterised in that at least part of the carbon-bearing material is fed onto the surface of the pellet bed. 3. A method according to claim 1 or 2, characterised in that at least part of the carbon-bearing material is fed onto the sintering underlay essentially simultaneously with the pellets that form the pellet bed. 4. A method according to claim 1, characterised in that part of the carbonbearing material is fed onto the surface of the pellet bed and part deeper among the pellets in connection with the feeding of the pellets forming the pellet bed. 5. A method according to any of the preceding claims, characterised in that at least 70% by weight of the carbon-bearing material needed in the sintering process is fed onto the surface of ready-made pellets prior to bringing the pellets to the sintering step. 6. A method according to any of the preceding claims, characterised in that the combustion rate of the carbon-bearing material is adjusted by means of the particle size of the carbon-bearing material. 7. A method according to any of the preceding claims, characterised in that the combustion rate of the carbon-bearing material is adjusted by feeding part of the carbon-bearing material to among the pellets. 8. A method according to any of the preceding claims, characterised in that the employed carbon-bearing material is coke. 9. A method according to any of the preceding claims 1-8, characterised in that the employed carbon-bearing material is wood charcoal. 10. A method according to any of the preceding claims 1-8, characterised in that the employed carbon-bearing material is mineral charcoal. 11. A method according to any of the preceding claims 1-8, characterised in that the employed carbon-bearing material is carbonaceous process waste. 12. A method according to any of the preceding claims 1-8, characterised in that the employed carbon-bearing material is carbonaceous dust. 13. A method according to any of the preceding claims 1-8, characterised in that the employed carbon-bearing material is a combination of various carbonbearing materials, containing at least two components from the group including coke, wood charcoal, mineral charcoal, carbonaceous process waste and carbonaceous dust.
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